Valve-case for mercurial air-pumps



(No Model.)

A. L.'-RIE.1NMANN.

VALVE GARR POR MERCURIAL AIR PUMPS. No. 331,546.

UNITED STATES PATENT lPrion..

ALBERT L. REINMANN, OF PITTSBURG, PENNSYLVANIA.

VALVE-CASE FOR MERCURIAL AIR-PUMPS.

SPECIFICATION forming part of Letters Patent No. 331,546, dated Decemberl, 1885.

Application liled September 24, 1885. -Serial No. 177,967. (No model.)

To a/ZZ whom it may concern,.-

Be it known that I, ALBERT L. REINMANN,

residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, a citizen of the United States, have invented ordiscovered certain new and useful Improvements in Valve-Cases forMercurial Air Pumps, of which improvements the following is aspeciiication.

In the accompanying drawings,which make part of this specification,Figure l is a sectional elevation of a length of pipe forming part of amercurial air -pump, said pipe having valvechambers for the reception ofiioat or automatically-acting valves. Fig. 2 is a similar view showingcertain moditications in the shape of the valve-chamber and thecontained valve. Figs. 3, 4, and 5 are views showing diiferentforms ofvalves in elevation.

In making these valve-chambers it is customary to enlarge a portion ofthe pipe in which said chambers are to be formed, and then afterinserting the valve to draw down the pipe at each end or side of theenlargement to the normal or desired size of the pipe, thus inclosingthe valve in a chamber having walls integral with the pipe at each sidethereof. This. construction is objectionable,for the reason that ii'thecontained valve is broken or injured in any way it is necessary toremove all that portion of the pipe in which the valve-chamber islocated, and substitute therefor an entirely new length of pipe, thusadding considerably to the cost of oper- -ating the pump.

The object of my invention is to so construct such portions of mercurialpumps as include chambers in their length as to permit of the readyinsertion and renewal of the valves without destroying the chamber inwhich the valve is located; and to this end my invention consists in theconstruction of parts, all as more fully hereinafter described andclaimed.

In carrying out my invention the pipe is made in sections l, 2, and 3,as shown, the length of such sections being determined by the locationof the valve-chambers. The adjacent ends of two adjoining sections arethen enlarged, as at 4, 5, 6, and 7, for the reception of the valve 8,the pipe at the ends of the enlargements being contracted, as shown. Theouter ends of the enlargements of two sections are made of such relativediameters that the end of one will t within the end of the other, theends being correspondingly tapered in order that they may be groundtogether, thereby making a hermetic joint.

In a mercurial pump having the valvechamber constructed as described thevalves are not put in place until the parts of the pump are placedtogether, thus avoiding any liability of breaking the valves inhandling, the pipe-sections having the valve-chambers integraltherewith.

Another import-ant advantage arising from the above describedconstruction of valvecase is the possibility of inserting atool withinthe enlargement for the purpose of properly shaping the Valve-seats atthe ends of the enlarged portions, Aand also of properly shaping andsizing the enlarged cavity to suit the kind of valve to be inserted inthe chamber. rlhe valves used in these chambers are varied as to shapeand size, as shown, and are adapted to close the opening at either endof the chamber, as desired. y

The valves employed in closing the lower end of the valve-chamber arepreferably made hollow for the reception of a small quantity of mercury,which, from its weightwill seat the valve before all the mercury canescape from the valve-chamber, the mercury caught in the chamber by theseating of the valve serving as a seal.

The desired amount of mercury may be sealed in the hollow valves, ifdesired; or an opening, 9, may be formed in the side of the valve, themercury filling the valve through said opening as it lls thevalve-chamber.

It will be noticed that in the above-described construction ofvalve-case the valve and valve-seat may be ground together for thepurpose of 'producing a perfeetlytight joint combination with a valvelocated Within said case, substantially as set forth. 1o

In testimony whereof I have hereunto set between them, and that the casecan be easily taken apart for the purpose of cleaning the oase-Valve.

I claim herein as my inventionmy hand. 5 In a mereurial air-pump, ava1ve-ease oon- ALBERT L. REINMANN.

sisting of the enlarged ends of adjoining seo- Witnesses:

DARWIN S. WOLCOTT,

tions of pipe forming a part ofthe pump, said enlarged ends fitting oneWithin the other, in R. H. WHITTLESEY.

